Roller of furniture-casters



v"UNITED STATES PATENT oFFioE.

PHILOSB. TYLER AND BENJN. LATI-1R01?, OF SPRINGFIELD, MASSACHUSETTS.

ROLLER OF FURNITURE-CASTERS.

To all whom t may concern Be it known that we, PHILos B. TYLER andBENJAMIN LATHROP, of Springfield, in

the county ofHampden and State of Massachusetts, have inventeda new anduseful Improvement in the Rollers of Furniture Casters; and we do herebydeclare that the same is fully described and represented in thefollowingspecification and the accompanying drawings, letters, figures,and references thereof. l

Of the said drawings, Figure 1, `denotes a side view--Fig 2,` an edgeview, and Fig. 3, a transverse section of our improved metallic casterroller. Fig. 4, is a transverse section of a metallic caster roller ofthe ordinary kind or that in common use. Fig. 5, exhibits a section ofour caster roller as it appears when rst cast or formed.

We would remark that as the consumption or use of casters for furnitureis very great, it becomes a highly important desideratum to constructthese rollers with the least amount of metal to insure the requisitestrength, and shape for the saving of a very small amount of metal inthe making a caster roller is a material item, lwhen large quantitiesare manufactured.

The metallic caster roller in common use, is most always constructedwith a section essentially as exhibited inFig. 4, it being cast in suchform, and subsequently in order to smooth or polish it, it is finishedin a lathe or on a mandrel. `The periphery `of this caster roller ismade curved in transverse section, and is usually a very flat curve andfrom the inner edge of the rim, the roller is curved inward toward thehub with a semicircular curve or `an approximation thereto as seen at,0,19, c. If we draw a line, a, d, parallel to the outer edge of the rim,and also draw another line, Ind, perpendicular to the axis of the hub weobtain a seetion, a, (Z, of an annulus of metal which by means of ourimprovement we dispense with on each side of the caster roller, while weproduce a caster roller having all the requisites of strength ofmaterial and sev- Specification of Letters Patent No. 11,502,` datedAugust 8 1854:.

eral important advantages over the common metallic rollers as thusrepresented.

In making our improved roller, we first cast or found it, with its endcylindrical and tubular as seen at, A, A, in Fig. 5, and we connect thisrim with the hub, B, by means of a flat annulus C, C, and while theroller is in the lathe or on a mandrel in revolution, we bring up andbear against its periphery a roller grooved around its periphery or sucha tool or instrument as will cause the rim to be bent down toward thehub in the manner indicated in section by the dotted lines of Fig. 5,and so as to impart to the rim about a semicircular curve in itstransverse section. This upsetting or bending down of the metal greatlycondenses and strengthens it, while the form of the bend renders the rimquite as well if not better prepared to resist blows and strainslaterally or vertically as the rim of the form exhibited in Fig; 4. Thecurve of the inner side of the rim is the reverse in our caster roller,to what it is in the roller shown in 4, while that of the outer surfaceis semicircular and not a fiat one.

We do not claim the metallic caster roller, as exhibited in Fig. 4, butwe do claim- The improved caster roller as made both externally and`internally as denoted in transverse section in Fig. 3. That is to say,with a bended rim united to an annulus or disk, made flat for somedistance, from the rim toward the hub, the bended rim and flat disk`producing a saving of the usual `amount of metal which would have to beemployed in the angles between them in order to insure the `requisitestrength and stiifness to the roller.

In testimony whereof we have hereunto set our signatures this twentyfirst day of February, A. D. 1854.

PHILOS B. TYLER. BENJN. LATHROP.

Witnesses:

O. A. SEAMANS, SAMUEL J. Ross.

